Drainage-valve fob



W. H. MCKISSICK.

DRAINAGE vALvE FOR DEEP wELL PUMPS.

APPLICATION FILED DEC. 7. I9IB.

Patented Aug. 26, 1919.

2 SHEETS-SHEET l- W. H. IVICKISSICK.

DRAINAGE vALvE Foa DEEP WELL PUMPS.

APPLICATION FILED DEC. 7, I9l8.

aucun,

ED STATES PATE OFFICE.

DRAINAGE-VALVE FOR DEEP-WELL PUMPS.

Specification of Letters Patent.

Patented Aug. 26, 1919.

Application illed December 7, 1918. Serial No. 265,762.

drainage valve when the pump tu e is raised to thereby permit the drainage of the pump tube.4

The general object of this invention is to rovide a very simple and easily operated evice to this end which includes a sl1d1ng member mounted upon the pump tube and frictionally engaging the well casing which is caused to move downward with the pum tube when the latter is inserted in the we l but which when the pum tube is raised will cause the opening ofthe Idrainage valve.

AV further Objectisl to provide a drainage valve which is also` adapted to be used as a check valve for admitting oil to the pump tube in the ordinary o eration of the pump or permitting the in ow of oil to the o1l tubewhen the pum tube is inserted in a well which is filled wit oil to a point above the valve.

Other objects will appear in the course of the following description.

My inventlon is illustrated in the accompanying drawings, wherein Figure 1 is a longitudinal sectional view of a well casing, a pumpv tube therein, and my drainage devices applied thereto;

Fig. 2 is a large fragmentary section illustrating the drainage valve in its open position;

Fig. 3 is a vertical sectional view of a well casing and pump tube provided with another form of my device; and

Fig. 4 is a like view to Fig. 3 rbut showing the pump tube partially in section and the valve raised.'

Referring to these drawings, 10 designates the well casing which is of the usual character and 11 an uppersection of the pump tube valves and means shoul which at its lower end usually carries a standing valve or ma carry a pump at the bottom of the tube. n deep wells it is often necessary to withdraw the pump tube in order to repair the pum or the standing be provided for draining off the oil within the ump tube which would otherwise be carrled to the surface and lost.

To this end, in the form of my invention uillustrated in Fig. 1, I dispose below the section 11 of the pump tube a 'section 12 which is connected to the section 11 by means of a coupling 13 of any suitable character, this coupling having a greater exterior diameter than the diameter of the pipes 11 and 12. Connected to the section 12 by a relatively thick coupling 14 is a lower tubular section 15. The ump, if one is used, may be connected to the ower end of this tubular section 15 or the standi valve may be located at the lower end of Iilzis Seotion.

The couplin 14, as before stated, is relatively thick an is formed with a longitudinally extending bore 16 closed at one end, as for instance by a plug 17, and in the opposite end of the bore there is screwed a sleeve 18. Slidingly mounted within this sleeve 18 and fitting it snugly is a hollow, longitudinally movable valve 19 having the form of a cylinder or small pipe section which is open as at 20 at its upper end and as at 21 at its lower end. This valve or pipe section 19 is longitudinally shiftable through the sleeve 18 and has a length greater than that of the sleeve 18 so that when this valve is disposed so that it extends above the upper end of the sleeve 18, the perforations 21 will be closed but when the valve is lowered so that its upper end is coincident with the upper end of the sleeve 18, the perforations 21 will be disposed beyond the lower end of the sleeve 18.

Disposed within the lower end of the bore 16 is a coiled compression spring 22 which urges the globular valve 23 against the lower open end of the tubular valve 19. Thus when the valve 19 is in its normal position, as illustrated in Fig. 1, passage throu h the tubular valve is prevented, but when tie valve 19 is forcedl downward and the erforations 21 are disclosed then communica-4 i connecting them are a plurality of bowed through a port 24 andthe perforations 21.

For the purpose of forcing this valve 19 downward and rendering it operative to drain the interior of the pump tubing, I mount upon the pump tubing section 12 below the collar 13 the spaced collars 25 and 26, these collarsbein loose upon the pump tubing 12. Attache to these collars and springs 27 which are resiliently urged outward into frictional ,engagement with the interior of the well casmg. Normally the collar 25 is disposed immediately beneath the coupling 13 and thus when the pump tube composed of the sections 11, 12 and l5 is forced downward through the casing, the collar 13 will force the friction device downward with it. When, however, the pump tube is pulled upward so as to remove the pump tube from the casing, the springs 27 engaging the well casing prevent the upwardV movement of the collars 25 and 26.

Now when the upper end of the valve 19 strikes the under face of the collar 26 this valve 19 will be forced downward until it is opened and the oil within the pipe 11 drains lout through theport 24 and the ports or Preferably the valve 23 will have a ground joint with the lower end of the sleeve 18 and the piston valve 19 will be open at its lower end and a lground joint will be secured between the valve 23 and the piston valve 19.

In Fig. 3, I show another form of this invention which operates in substantially the same manner. This form is particularly adapted to be used below the pump itself or below the standing valve of Ithe pumptube. In this figure, 28 designates a lower section of the pump tube and 29 a lcoupling providin-g a valve seat for a standing valve 30. Engaged 'by the coup-ling 29 and depending from it is a pipe section 3l which is provided with a pair of longitudinally extending slots 32. Disposed within the pipe section 31 is a T-shaped member 33, the cross bar of which extends through the slots 32.

The shank of this T-shaped member 33 is disposed immediately beneath 'the ball valve 30 and if this T-shaped member be raised, relative to the ball valve, it willlift the ball valve from its seat. y

For the purpose of automatically and relatively raising this T- shaped member 33 when the pump tube is raised to thereby drain the pump tube of oil, I mount u-pon the exterior of the pipe section 13 the collars 34 and 35 which have sliding engagement upon the pipe section 31. These collars are connected by the outwardly bowed springs 36 which bear frictionally against the well casing. Carried upon one of these collars is an L-'shaped member 37 having an arm 3-8 which extends circumferentiallyaround the pipe 31 and in a plane below the collar 34.

The operation of this device is as follows: When the pump tube is inserted in the well, the friction of the springs against the well casing will, ofcourse, prevent any downward movement of the friction device until such time as the collar 29 strikes the collar 34. When this occurs the collar 34 and the springs are forced downward. Now when the pump tube is withdrawn or when it is desired to drain the pipe, then on an upward movement of the pump tube the springs 36 will hold the collars 34 and 35 from upward movement with the pump tube. Now when the arm 33L of the T-shaped bolt 33 has been lifted above the L-shaped lug 38 then the tubing 28 and 31 is turned to the right to cause the arm 33a to hook over the L-shaped lug 38. Then the tubing sections 31 and 28 are lowered and as the T-shaped member 33 is held stationary by the lug. 38 the valve 30 will be brought against the upper end of the member 33 and the valve will be raised and thus the liquid may be drained 'back into the well.

It will be seen that both of ,these devices are of very simple construction and easily operated, that they involve no rotation of the pump rod and in they case of the mechanism illustrated `in Figs. 3 and 4, only a slight rotation of the pump tube, and that a relatively slight movement of the pump tube is sufficient to cause the opening of the valve. l

'While I have illustrated two forms of my invention which I believe to be particularly practical and effective in use, yet I do not wish to be limited to these, as it is obvious that many changes might be made therein, without departing from the spirit of the invention as defined in the appended claims.

I claim 1. The combination with a pump tube, of

a normally closed drainage valve mounted l in the pump tube, a friction device slidably mounted upon the pump tube and adapted vto engage a well casing in which the tube is inserted, means limiting the sliding movement of said friction device relatively upward on the pump tube, and means engaged by said friction device upon a relatively upward movement of the pump tub-e causing rthe opening of said valve.

2. Thecombination with a pump tube, ofV

ing the downward movement of the said means upon the downward movement of the pump tube, but permittingan upward movement of the pump tube independent of said means.

3. The combination with a pump tube, of a normally closed drainage valve mounted in the pump tube, a member slidingly mounted upon the exterior of 4the pump tube and having outwardly urged' resilient portions frictionally engagealble with a wall of the well casing; means on the pump tube carrying said member downward when the pump tube is lowered but permitting the independent upward movement of the pump tube, said sliding member operatively engaglng the valve to lift it when said sliding member is held from relative movement with the pump tube and the pump tube is shifted in a predetermined direction.

4. The combination with a pum tube, of a drainage valve in the pump tu e, a pair of spaced collars loosely surrounding the pump tube, outwardly bowed springs connecting said spaced collars and adapted to bear frictionally against a well casing, a member mounted upon the pump tube operatively engaging the uppermost of said collars to cause the downward movement of the collars andthe springs with the pump tube, but permitting the free upward movement of the pump tube, and means actuated by one of said collars for shifting the valve to an open position when the pump tube is moved relative to said collars.

5. The combination with a pump tube of a drainage valve including a sleeve, a s iding drain pipe mounted in said sleeve and longer than the sleeve and having perforations 'at one end and open at its other end, a pair of collars mounted upon the pum tube for sliding movement, outwardly bowe springs connecting said collars and adapted to frictionally engage a well casing, a member mounted upon the pump tube and shiftable into engagement with the uppermost of said collars 4to thereby shift the collars downward with the pump tube but permit the upward movement of the pump tube relative to the collars, the lower collar being disposed in the path of movement of the tubular valve whereby when the pump tube is lifted relative to the collars, the lowermost collar will strike the valve and shift it to an open position.

6. The combination with a pump tube, of a drainage valve including a sleeve, a sliding drain pipe mounted in said sleeve and longer than the sleeve and being open at its opposite ends and formed with perforations adjacent its lower end, the tubularmember being longer than the sleeve, a spring actuated valve normally closing the lower open end of the tubular member, a pair of collars mounted upon the pump tube for sliding movement, outwardly bowed springs connecting said collars and adapted to frictionally engage a well casing, a member mounted upon the pump tube and shift- .able into engagement with the uppermost of said collars to thereby shift the collars downward with the pump-tube but permit the upward movement of the pump tube relative to the collars, said valve being disposed in the path of movement of the tubular valve whereby when the pump tube is lifted relative to the collars, the lowermost collar will strike the valve and shift it to an open position.

7. The combination with a pump tube, of a draina e valve mounted upon said pump tube resi iently urged to a closed position, said valve being movable in a direction parallel to thepump tube, a collar loosely supported upon the pump tube for sliding movement and adapted to frictionally engage a well casing, said valve being disposed in the path of movement of the collar whereb to cause the opening of the valve when t e collar and pump tube are moved in one direction relatively to each other and the collar operatively engages with the valve, and means on the pump tube for causing a movement of said collar downward with the pump tube but permitting an independent upward movement pf the pump tu e.

8. The combination with a pump tube, of a diametrically enlarged member mounted upon the pum tube and having a longitudinally extending bore exterior to the pump tube, said member being hollow and communicating with the pum tube and said bore, a longitudinally s idable drainage valve mounted in said member and resiliently urged to a closed position, said valve when in a closed position projecting upward out of said bore and beyond said memupward movement of the pump tube.

9. The combination with a pump tube, of an annular hollow member mounted upon the pump tube and communicating therewith and having a longitudinally extending bore disposed exteriorly to the pump tube but in communication with the lnterior of the member, a sleeve mounted in the upper end of the bore, a tubular valve mounted in and longer than the sleeve and longitudinally shiftabletherethrough, the inner end of the valve being open, a spring urging the Valve upward to thereby cause the lower perforations to be closed by the sleeve, and a member slidably mounted upon the pump 5 tube and having means for frictionally engaging the wall of a well casing, said memp ber when the pump tube is ralsed relative 'to the member engaging the valve to open' .it, the pump tube being provided with means 10 for causing the coincident downward move- .WILLIAM n. MCKISSICK.

Witnesses:

E; A. SHAW, J. C. SN. 

